package com.lovelyj.trip_by_train.config;

import com.lovelyj.trip_by_train.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    private final HttpMessageConverters messageConverters;

    public WebMvcConfig(HttpMessageConverters messageConverters) {
        this.messageConverters = messageConverters;
    }

    /**
     * 设置静态映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
        registry.addResourceHandler("/js/**").addResourceLocations("classpath:/js/");
        registry.addResourceHandler("/element-ui/**").addResourceLocations("classpath:/element-ui/");
    }


    /**
     * 扩展mvc框架消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展jackson消息转换器");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageconverter = new MappingJackson2HttpMessageConverter();
        //设置对象转化器，底层使用Jackson将Java对象转为json
        messageconverter.setObjectMapper(new JacksonObjectMapper());
        converters.add(0,messageconverter);
    }
}
